:root {
  --blue: #38b6ff;
  --blue-deep: #087bc1;
  --ink: #101114;
  --muted: #6e737b;
  --line: rgba(16, 17, 20, 0.1);
  --paper: #f5f7fa;
  --white: #fff;
  --shell: min(1180px, calc(100vw - 44px));
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; background: var(--paper); }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }
.shell { width: var(--shell); margin-inline: auto; }

.site-header {
  position: fixed; inset: 0 0 auto; z-index: 100;
  background: rgba(250, 252, 255, 0.72); backdrop-filter: saturate(180%) blur(22px);
  -webkit-backdrop-filter: saturate(180%) blur(22px); border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s;
}
.site-header.scrolled { background: rgba(250, 252, 255, 0.9); border-color: var(--line); }
.nav { height: 64px; display: flex; align-items: center; gap: 36px; }
.brand { margin-right: auto; display: flex; align-items: center; }
.brand img, .footer img { width: 132px; height: 34px; object-fit: contain; object-position: left center; }
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { font-size: 13px; color: #34373c; transition: color .2s; }
.nav-links a:hover { color: var(--blue-deep); }
.nav-cta { font-size: 13px; background: var(--blue-deep); color: #fff; padding: 9px 17px; border-radius: 999px; }
.menu-button { display: none; border: 0; background: transparent; width: 34px; height: 34px; padding: 8px; }
.menu-button span { display: block; width: 18px; height: 1px; background: var(--ink); margin: 5px 0; }

.hero { min-height: 100svh; padding-top: 64px; position: relative; overflow: hidden; background: linear-gradient(180deg, #fbfdff 0%, #edf4fa 100%); }
.hero-copy { position: relative; z-index: 3; padding-top: clamp(84px, 12vh, 140px); text-align: center; }
.eyebrow, .section-kicker { font-size: 12px; line-height: 1; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; color: var(--blue-deep); }
.hero h1 { font-size: clamp(52px, 8vw, 102px); line-height: .98; letter-spacing: -.065em; margin: 24px 0 24px; font-weight: 720; }
.hero h1 span { background: linear-gradient(92deg, #087bc1, #38b6ff 48%, #7258ff); background-clip: text; -webkit-background-clip: text; color: transparent; }
.hero-lead { width: min(610px, 90%); margin: 0 auto; color: #4f555c; font-size: clamp(18px, 2vw, 23px); line-height: 1.55; }
.hero-actions { margin-top: 30px; display: flex; gap: 28px; justify-content: center; align-items: center; }
.button { display: inline-flex; justify-content: center; align-items: center; border: 0; border-radius: 999px; min-height: 46px; padding: 0 24px; font-weight: 600; cursor: pointer; }
.button.primary { background: var(--blue-deep); color: white; box-shadow: 0 12px 30px rgba(8, 123, 193, .22); transition: transform .2s, box-shadow .2s; }
.button.primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px rgba(8, 123, 193, .28); }
.text-link { color: var(--blue-deep); font-size: 16px; font-weight: 600; }
.text-link span { font-size: 24px; vertical-align: -2px; margin-left: 3px; }
.hero-visual { width: min(1160px, 92vw); height: clamp(360px, 49vw, 650px); margin: -16px auto 0; position: relative; z-index: 1; }
.hero-visual::before { content: ""; position: absolute; inset: 6% 8% 1%; z-index: -1; background: radial-gradient(ellipse, rgba(56, 182, 255, .25), transparent 68%); filter: blur(30px); }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; object-position: center; border-radius: 38px; mask-image: linear-gradient(to bottom, transparent 0, #000 12%, #000 82%, transparent 100%); -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 12%, #000 82%, transparent 100%); }
.scan-line { position: absolute; left: 52%; top: 27%; width: 1px; height: 42%; background: linear-gradient(transparent, rgba(56,182,255,.8), transparent); box-shadow: 0 0 18px 5px rgba(56,182,255,.28); animation: scan 4.8s ease-in-out infinite; }
@keyframes scan { 0%,100% { transform: translateX(-120px); opacity:.25; } 50% { transform: translateX(170px); opacity:1; } }
.hero-facts { position: relative; z-index: 4; margin-top: -50px; margin-bottom: 30px; display: grid; grid-template-columns: repeat(3, 1fr); max-width: 820px; padding: 22px 30px; border: 1px solid rgba(255,255,255,.7); background: rgba(255,255,255,.68); backdrop-filter: blur(20px); border-radius: 24px; box-shadow: 0 20px 60px rgba(25,61,84,.1); }
.hero-facts div { text-align: center; display: flex; flex-direction: column; gap: 4px; }
.hero-facts div + div { border-left: 1px solid var(--line); }
.hero-facts strong { font-size: 24px; }
.hero-facts span { color: var(--muted); font-size: 13px; }

.intro { padding: clamp(120px, 17vw, 220px) 0; }
.intro h2, .grid-heading h2, .contact h2 { font-size: clamp(42px, 6vw, 76px); line-height: 1.08; letter-spacing: -.055em; margin: 20px 0 28px; }
.intro-text { max-width: 720px; margin-left: auto; font-size: clamp(21px, 2.7vw, 34px); line-height: 1.42; letter-spacing: -.02em; color: #5c6169; }

.feature { min-height: 880px; margin: 0 12px 14px; border-radius: 34px; overflow: hidden; position: relative; isolation: isolate; display: grid; align-items: start; }
.feature-copy { position: relative; z-index: 3; width: min(720px, calc(100% - 44px)); margin: 0 auto; padding-top: 90px; text-align: center; }
.feature-copy h2 { font-size: clamp(44px, 6.2vw, 82px); line-height: 1.02; letter-spacing: -.058em; margin: 18px 0 24px; }
.feature-copy > p:not(.section-kicker) { max-width: 650px; margin: 0 auto; color: #62676e; font-size: 19px; line-height: 1.65; }
.feature-light { background: #fff; }
.feature-dark { background: #020811; color: #f8fbff; }
.feature-graphite { background: #101216; color: #f8fbff; }
.feature-dark .feature-copy > p:not(.section-kicker), .feature-graphite .feature-copy > p:not(.section-kicker) { color: #b8c0c9; }
.tag-row { display: flex; gap: 9px; flex-wrap: wrap; justify-content: center; margin: 26px 0 22px; }
.tag-row span { font-size: 12px; border: 1px solid rgba(100,110,120,.26); border-radius: 999px; padding: 7px 12px; }
.feature-dark .tag-row span, .feature-graphite .tag-row span { border-color: rgba(255,255,255,.22); color: #e2e8ef; }
.light-link { color: #6dc8ff; }
.feature-image { width: min(1120px, 100%); height: 560px; justify-self: center; margin-top: 34px; }
.feature-image img { width: 100%; height: 100%; object-fit: cover; object-position: center; border-radius: 30px 30px 0 0; }
.image-full { width: 100%; height: 560px; margin-top: 36px; }
.image-full img { border-radius: 0; mask-image: linear-gradient(to bottom, transparent, black 16%); -webkit-mask-image: linear-gradient(to bottom, transparent, black 16%); }

.service-grid { padding: clamp(120px, 16vw, 210px) 0; }
.grid-heading { max-width: 850px; margin-bottom: 64px; }
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.service-card { position: relative; min-height: 430px; padding: 44px; border-radius: 28px; overflow: hidden; background: #fff; box-shadow: 0 18px 55px rgba(23, 45, 62, .07); }
.service-card::after { content: ""; position: absolute; width: 290px; height: 290px; border-radius: 50%; right: -120px; bottom: -130px; background: radial-gradient(circle at 35% 35%, var(--card-color), transparent 67%); opacity: .28; }
.service-card[data-accent="cyan"] { --card-color:#38b6ff; }
.service-card[data-accent="blue"] { --card-color:#2171ff; }
.service-card[data-accent="violet"] { --card-color:#7258ff; }
.service-card[data-accent="sky"] { --card-color:#7bddff; }
.service-card[data-accent="indigo"] { --card-color:#3345a8; }
.service-card[data-accent="silver"] { --card-color:#8898aa; }
.service-number { color: var(--blue-deep); font-size: 13px; font-weight: 700; letter-spacing: .1em; }
.service-card h3 { font-size: clamp(30px, 3.2vw, 47px); line-height: 1.06; letter-spacing: -.04em; margin: 30px 0 22px; }
.service-card h3 span { color: var(--card-color); }
.service-card p { color: #5b6169; font-size: 17px; line-height: 1.6; max-width: 470px; }
.service-card ul { margin: 28px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.service-card li { font-size: 12px; padding: 7px 11px; background: #f1f4f7; border-radius: 99px; color: #59616a; }

.process { padding: clamp(110px, 15vw, 190px) 0; background: #fff; }
.process-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.process-list li { display: grid; grid-template-columns: 100px 1fr; padding: 34px 0; border-bottom: 1px solid var(--line); }
.process-list li > span { font-size: 13px; font-weight: 700; color: var(--blue-deep); }
.process-list h3 { margin: 0 0 8px; font-size: 27px; letter-spacing: -.02em; }
.process-list p { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.6; }

.about { padding: 120px 0; }
.about-panel { min-height: 650px; border-radius: 34px; padding: clamp(44px, 8vw, 100px); display: flex; flex-direction: column; justify-content: flex-end; color: #fff; overflow: hidden; position: relative; background: radial-gradient(circle at 80% 20%, rgba(56,182,255,.6), transparent 35%), radial-gradient(circle at 30% 80%, rgba(114,88,255,.45), transparent 40%), #06121c; }
.about-panel::before { content:""; position:absolute; inset:-30%; background: repeating-radial-gradient(circle at center, transparent 0 28px, rgba(255,255,255,.055) 29px 30px); transform: perspective(700px) rotateX(62deg) translateY(-5%); }
.about-panel > * { position: relative; z-index: 1; }
.about-panel .section-kicker { color: #72cbff; }
.about-panel h2 { font-size: clamp(47px, 7vw, 90px); line-height: 1; letter-spacing: -.06em; margin: 20px 0 28px; }
.about-panel > p:last-child { max-width: 630px; color: #c8d3dd; font-size: 19px; line-height: 1.65; }

.contact { padding: 90px 0 150px; display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(40px, 8vw, 100px); align-items: start; }
.contact-copy { position: sticky; top: 110px; }
.contact-intro { color: var(--muted); font-size: 17px; line-height: 1.65; }
.contact-details { display: grid; gap: 20px; margin-top: 34px; }
.contact-detail { display: grid; gap: 5px; }
.contact-detail span, .contact-wechat span { color: var(--muted); font-size: 13px; }
.contact-detail a { width: fit-content; color: var(--blue-deep); font-size: 19px; font-weight: 600; overflow-wrap: anywhere; }
.contact-detail a:hover { text-decoration: underline; }
.contact-wechat { display: grid; justify-items: start; gap: 10px; margin-top: 4px; }
.contact-wechat img { width: 220px; height: 220px; padding: 9px; border: 1px solid var(--line); border-radius: 18px; background: #fff; object-fit: contain; }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; padding: 34px; border-radius: 28px; background: #fff; box-shadow: 0 24px 70px rgba(30,55,75,.08); }
.contact-form label { display: flex; flex-direction: column; gap: 9px; }
.contact-form label span { font-size: 13px; font-weight: 600; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; border: 1px solid #dfe4e9; border-radius: 13px; padding: 14px 15px; background: #fafbfd; outline: none; transition: border-color .2s, box-shadow .2s; }
.contact-form textarea { resize: vertical; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 4px rgba(56,182,255,.12); }
.contact-form .full { grid-column: 1 / -1; }
.form-note { margin: -4px 0 0; text-align: center; font-size: 12px; color: var(--muted); }
.form-note.error { color: #b74141; }

.footer { background: #eef1f4; border-top: 1px solid var(--line); }
.footer-inner { min-height: 120px; display: flex; align-items: center; gap: 30px; }
.footer-inner p { margin-left: auto; color: var(--muted); font-size: 12px; }
.footer-inner div { display: flex; gap: 20px; font-size: 12px; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .85s cubic-bezier(.2,.65,.2,1), transform .85s cubic-bezier(.2,.65,.2,1); }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 820px) {
  :root { --shell: min(100% - 32px, 680px); }
  .nav { height: 56px; }
  .brand img { width: 112px; }
  .menu-button { display: block; }
  .nav-cta { display: none; }
  .nav-links { position: absolute; inset: 56px 0 auto; display: none; flex-direction: column; align-items: flex-start; gap: 0; padding: 16px; background: rgba(250,252,255,.97); border-bottom: 1px solid var(--line); }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 14px 8px; font-size: 16px; border-bottom: 1px solid var(--line); }
  .hero { padding-top: 56px; }
  .hero-copy { padding-top: 72px; }
  .hero-actions { flex-direction: column; gap: 15px; }
  .hero-visual { width: 112vw; height: 390px; margin-left: -6vw; margin-top: 20px; }
  .hero-visual img { border-radius: 24px; object-position: 58% center; }
  .hero-facts { width: calc(100% - 32px); padding: 18px 8px; margin-top: -18px; }
  .hero-facts strong { font-size: 19px; }
  .hero-facts span { font-size: 10px; }
  .intro { padding-inline: 16px; }
  .intro-text { margin-top: 46px; }
  .feature { min-height: 720px; margin-inline: 7px; border-radius: 24px; }
  .feature-copy { padding-top: 68px; }
  .feature-image, .image-full { height: 410px; margin-top: 34px; }
  .feature-light .feature-image { width: calc(100% - 20px); }
  .feature-image img { border-radius: 22px 22px 0 0; }
  .image-full img { border-radius: 0; }
  .cards { grid-template-columns: 1fr; }
  .service-card { min-height: 400px; padding: 34px; }
  .process-list li { grid-template-columns: 58px 1fr; }
  .about { width: 100%; padding: 70px 7px; }
  .about-panel { border-radius: 24px; min-height: 560px; }
  .contact { grid-template-columns: 1fr; }
  .contact-copy { position: static; }
  .contact-form { grid-template-columns: 1fr; padding: 24px; }
  .contact-form .full { grid-column: auto; }
  .footer-inner { padding: 34px 0; flex-wrap: wrap; }
  .footer-inner p { order: 3; margin: 0; width: 100%; }
  .footer-inner div { margin-left: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}